They have promised to pay for any sheep taken by the animals and say lynx will be a boost to local tourism, as sightseers attempt to catch a glimpse of the cats. They are planning to establish a visitor centre and also plan to track the released animals by satellite so they can monitor where the animals go, and check if they have killed wildlife.
“If the lynx do kill any sheep then compensation must be paid, no question.” said Steve Piper, the Trust's chief communications advisor.
“An ongoing compensation program would be prioritised from the visitor centre income, and it's worth clarifying that Lynx populations grow very slowly, six of them cannot dramatically balloon in just five years, and the satellite tracking makes it possible to trap them all again at any point in a trial, we can always wind things back.
“Farmers may not believe us, but we want this to work for them.
“A sheep welfare grant program funded by lynx eco-tourism can help local farmers with things like building lambing shelters, effectively delivering vaccinations and other critical early-life care, maintaining fencing to reduce road kills.”
Other conservation groups want to rewild wolf and even brown bears in Britain claiming it will help cut the burgeoning deer problem.
However the National Farmers Union said it was still concerned about the impact of introducing a new species.
NFU countryside adviser Claire Robinson said: “Any species reintroduction, particularly if it hasn’t been in this country for hundreds of years, can have a massive impact on the many benefits that the countryside delivers – local wildlife and biodiversity.
“Our biggest concerns would be the impact on the animal welfare and safety of livestock. The Kielder Forest is a remote upland area dependent on sheep farming and our fear is that these predators would prey on lambs.
"We have not seen any evidence that there are adequate plans to mitigate this concern and there is no evidence that lynx will stay within woodland or forestry. The proposals to monitor Lynx’ impacts on sheep is not acceptable."
The National Sheep Association added: "The NSA does not accept the promise that lynx would add to eco-tourism, boosting the local economy in Kielder, nor does it accept a compensation system as a justification for a lynx introduction to go ahead.
"Aside from the challenges of guaranteeing indefinite financial support for the additional costs to sheep farmers, a compensation scheme would be complicated and controversial.
"NSA believes justifying the reintroduction of lynx by having a compensation system in place undermines the efforts that farmers go to in order to protect their flocks and maintain high welfare standards, as strived for by the farmer, required by legislation and demanded by the consumer.”
Natural England is currently deciding whether to allow the reintroduction in Northumberland.